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To determine if a bacterium can ferment a particular carbohydrate and determine the end products of that fermentation
Wiki User
∙ 15y ago
Wiki User
∙ 9y agoPhenol red in a medium is used as a pH indicator. In an acidic pH, phenol red will turn yellow.
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Explain the function of phenol red in the urea broth medium?
phenol red act as the pH indicator. As the substrate urea is split into products, the presence of ammonia caused alkaline environment that cause the phenol red to turn to deep pink. Useful to test Proteus vulgaris.
What state of matter is phenol red solution?
A solution of phenol red is a liquid.
What color does phenol red change to when carbon dioxide is present?
It turns a yellow-ish color when CO2 is added.
Why is rpmi 1640 red in color?
RPMI (Roswell Park Memorial institute) formula is red in color because a pH indicator, phenol red, is usually added to it. When living animal cells are grown in RPMI formula, they release metabolic waste products that change the pH toward acid (sort of like peeing in a swimming pool). As the acid wastes build up, the color fades from red to pink, and can even turn straw yellow with a lot of waste product contamination. The phenol red color changes indicate when the medium needs to be changed, which can differ according to the needs of the project. Maybe at the pink pH stage, or at the yellow pH stage, for example. This avoids having to keep testing the contents of the test tube or flask to determine how the pH is changing. Too much acid, and the cells will do poorly, or even die. The 'old' medium is decanted and fresh medium is poured in, if the cells need to keep growing in the same test tube or flask.
List and explain the characteristics of development administration?
the characteristic of development is how to prepa red yo urself
Purpose of the phenol red in the medium?
Phenol red acts as the pH indicator. Turning yellow as the ph lowers (acidic environments) and deep red when the ph is high (alkaline environment)
Explain the function of phenol red in the urea broth medium?
phenol red act as the pH indicator. As the substrate urea is split into products, the presence of ammonia caused alkaline environment that cause the phenol red to turn to deep pink. Useful to test Proteus vulgaris.
What is the purpose of phenol red or bromcresol purple in fermentation tube?
These are both used as pH indicators.
Does phenol red change baking soda to red?
Phenol red is a pH indicator. The baking soda is not changing color, but the phenol red is.
Is phenol red is a strong base and acids?
Phenol red is a weak acid.
What state of matter is phenol red solution?
A solution of phenol red is a liquid.
Is phenol red toxic?
no
What color is phenol red at a neutral?
Phenol red is made by condensation of Phenol and saccharine.pH below 6.8 = YellowpH above 8.2 = Red/FuschiaGradually turns from yellow to red/fuschia (pH between 6.8 and 8.2 = Pinkish)
What color is phenol red dropped into distilled water?
red
What reaction do you get when you mix phenol red with acids and bases?
Phenol red is yellow under pH=6,8 and pink over a pH=8,2.
How do you make a solution of phenol red?
Boil red cabbage in water to make phenol red. This works well depending on how long you boil it will determine the strength of the solution.
What color is phenol red at an base pH?
green
